Well-bailing pump



Aug. 5, 1930. w. sHELDoN WELL BAILING PUMP .Filed .Aug..1, 1925 2 Sheets-'Sheet l I w UHU lNvENToR @L BWM.

. AT oRNEY Aug. 5, 1930.

w. sHl-:LDoN

-WELL BAILING PUMP Filed Aug. 1

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m IM H uuml n ku l iwwilmu Patented Aug. 5, 1930 UNITED STATES PATENT oFvFlvcE WALDo sHELDoN,or SOUTH NORWALK-7 ooNNEc'rIcU'r` Application iled August 1, `1925. SerialNo. 47,599.

This invention relates to the drilling of oil wells and the `bailing of such wells. Y

For hailing operationspthe present day practices are either to use al special bailing bucket orto use a specialbailing pump. The first of these methods is cumbersome, slow and tedious. The second method is expensive, requiring the sinking of a special pump casing with numerous appurtenances. Both 'meth- 10 odsv require considerable additional equipment` over that necessary for the drilling operations. .c v v Y Special objects of this inventionk are t0 overcome thefobjections noted and to provideV simple, practical means for hailing and which will make use of and ybe formed in part by regular parts ofthe `usuall rotary drilling rig. v j f j l In the attainment of these vobjects one fea# ture of the invention consists in utilizing the tubular drill stemfwhich is usedL in rotary drilling, for supporting and operating a long stroke pump, lowered in the hole by said drill stem and then operated by raising and lowering-theystem or pipe. :This method enables the flexible hose which is usually con- VnectedV withy the `head of the drill pipe by a swivel toV beutilized as a part of the pump conduit. f f l Variousother novel features, and advan-` tages of the invention will appear as the spec# ication proceeds. `l ,i

In the drawingsV accompanying and forming part of this specification,theinvention is kshown embodied in `only `one of its many possible commercial forms, 'so it should be understood that the structure may be modiA ed without departure from the basic spirit and vscope of the invention. i, j j 40 v `Figure 1 is a moreor lessdiagrammatic broken view illustrating ,A application and adaptationjof the invention to a rotary `well drilling outfit. Lf Y y j c Figures 2 and 3 are sectional views onv an 45 enlarged scale of the Vpump' structure at tachedfto the lowervend` of the drill pipe.- Figure 4 is ja Lbroken detailshovving the pump supported with itsintake above the bottom of the well. U j The rotary illustrated Figure 1 is of the through the. drill" pipewith valves 18, 20 lopen f and'valve,v 19 closed@ Asubstituting special bailing ,apparatus in its stead, the drill pipe is `retainedfand used as type disclosed in my co-pending applications, Serial dir-711,982; 739,495 and 6,535, in which the rotary table indicated athas slidingly keyed to it, a sleeve 6 which can be raised and lowered by a hydraulic cylinder.y This sleeve ordinarily carries a chuck inthe na-k ture cfa colletffor gripping the drill ,Stern indicatedv at 7. 4As they invention is adapted' to other forms of rota-ries and as the hydraulic pressure feed and chuck form no parts v of the present invention, the same are not il. lustrated. t

. The drill pipe 7 is shownv as of the special flush joint construction disclosed and claimed in my co-pending application, #43,131, in which adjacent sections of pipe are connected by coupling members 8 shown in Figure 2` as screwed fast .at9 in the end of one section and having a reinovablecbox and pin joint 10 with the other section This flush joint pipe is decidedly advantaceous inthe present invention `because of the continuous smooth flush exterior it presents, but as with theA rotary, it should be understood `that the invention is not necessarily limited to this particular type of drill pipe. i For the ordinary drilling operations,a wa-v ter swivelll is connected with the .upper end of the drill pipe anda length of flexible hose 12extends from the swivel tothe upper end of a stand pipe 13 which is in communication with `thepunap indicatedat :14.k This pump 'is shown connectedjin'the `usualway by inlet and returnl piping 15, 16 with themud tank 17 and as-Yprovided .with valves 18,19, 20 by whichY ai local circulation can befcontrolled through the tank with valves 18, 19 open and val-ve 20 closed; 'or themud be forced `down* 9o j The operation, of,k the-rotary` is `sov well known asto require no description, When hailing becomes.,necessary,` with this invention, instead kof discarding. thedrill pipe and a `connection for lowering` andgoperating a long stroke hailing pump andas a conduit j `forcarrying the ilow'to the surface. This pumpy structure is indicatedin a general .way 1m.

f iny this instance and at 2l in Figure l, attached to the lower end of the drill pipe.

illustrated in VFigures 2 and 3, where it is lshown made up of a long cylindrical barrel 22 of a size to be lowered linto, the bore anda pistonl 23 operating in said barrel and d1- rectly attached to the lower end ofthe drillV h provides abundant power to lift the liquid and' discharge it through the flexible hose stem. n p A y The lower end of" the barrel 1s shown as having a'heavy shoe 24 screwed thereon, pro-` vided with a central bore 25 and lateral branches 26, which shoe servesl as aweight for steadying and holding the barrel in place at the bottom of the hole and as an inlet to the pump barrel. The weight has an up- Wardly projecting portion 25 serving as a sleeve-to surround the lower end of the pump barrel and foot valve and protecting the valve from injury which might result when loweringthe` pump structure down into the hole. Within the lower end of the barrel is provided an upwardly opening valve 27 arranged to cooperate with an upwardly faced seat 28 and t-he piston carries an upwardly opening valve 29 cooperating with an upwardly faced seat 30. The upstroke of the piston within'the pump barrel is limited by engagement of the piston with a guide and stop ring 3l provided in the upper end of the barrel. j I Y f In operation, to use thebailer it is only necessary, after uncoupling the drill pipe f from driven-engagement with the table, to

withdraw the pipe, attach Vthe'pump onto the lower end kof the drill pipe and then lower the drill pipe into the hole until the pump barrel comes to rest on the bottom. Them by raising and lowering'the drill pipe, with the hoist mechanismprovided for that purpose,-the apparatusvwill operate to pumpthe well liquid up through thehollow drill stem and such liquid will he carried olfl through the swivel and flexible hose which is alreadyattached at the head of the drill stem andv down through the stand pipe from whence it may` means that the pump can be quickly attached be piped ofi' injany direction.

Inplace of the usual hoist, a special pumping rig maybe utilized for reciprocating the drill stem but the ordinaryjhoist will sui'iiceV for the purpose, beingoperated to aetuate the pumpl kat the desired pumping speed. 'I he hoseis sufliciently iiexible for this pumping.V

action and is usually of a vlength tov allow forgthe long stroke used, the connection "with they standfpipe preferably being made some'- IWhere near the middle of suchV stroke. V

` The pump chamber into. which the liquid enters being kbelow thelpiston, isfilled upon the upstrokevof the piston,\as will be cleaiI from Figure k3', the piston valvefbeing closed Y the lower, inlet valve opening to admit. the liquidwhich rises into the'pump chamber, the static head of the liqrof the drill uid in the well filling the chamber and assistingin lifting the piston and drill stem. On the down-stroke of the drill pipe, the inlet valve closes and the piston valve opens so that the liquid trapped in the pump chamber below the piston is forced up through the conduit provided by the drill pipe. The entire weight of the drill pipe thus becomes effective on the active stroke ofthe pump and and stand pipe. The upward stroke of the drill pipe is aided by the static head of the liquid in the well softhat with the expenditure of amoderate amount of energy, a powerful pumping effect is obtained and this with thelong stroke action makes the in- Vention particularly suitedlto the pumping of deep wells. Y

The-pump attachment is relatively simple and of sturdy construction, requiring no spelcial care in handling or operation; Of importance in the latter connection is the fact that overstroking cannot injure the device as in the lowering movement the liquid cushions thepiston and the shoe at the foot oi the pump is strong enough to stand any hammer of the drill pipe, while an excessive lifting movement simply brings the piston up into engagement with the guide at the upper end of thecylinder, lifting the cylinder olf bottom.

lf it be desired to take the liquid from a higher level at some point above the bottom of the hole this is readily effected by simply screwing on one or more support-ing pipe section'sfontoftheb'ottom of the pump cylinder, as-rindicated at 32V in Figure 4. In such a case the supporting shoe may be screwed onto the foot of such a supporting pipe section or sections;` Y

To facilitate connectiony of the pump attachment to the drill stem, the piston may be carried by a tubular section 33 similar to the drill pipe sections and having a box and pin joint l0 (Figure 2) with the coupling member on the lower end of the drill pipe. This to or `detached fromthe drill flush form of the ous smooth cylindrical exterior which does not? in any way interfere withthe operation pipe as a reciprocatingv pump plunger. One ofY these "-llush joints is indipipe and the cated'in' Figures Y2 and 3 as actually passing joints presents a continuthrough the guide'in'the upperendof the i pump barrel. Theutilization of the weight of the drillstem enables the pump to-be operated Vwith a long strokelimitedY only by practical-working conditions, such fory in` stance as thje'height of the derrick, which determines jthedisltance lthe drillf'pipe can be raised and lowered iny the pumping action.

.The invention, it will he seen, provides apracticalf form of'long stroke pump which the Hush joints enabling the pipe to pass continuously through the table.

In the present disclosure, 'the well has a i casing 34 carrying a stuffing box 85 and this stuffing box serves the additional function o a guide for the drill pipe during its pumping action, the flush joint structure of the'drill pipe enabling it to operate through this stuifing boX with perfect freedom. If the hoist of the rotary is used as the means for reciprocating the drill stem, the same connections which sustain the swivel during the rotary drilling operations may bev employed during the pumping operations. Thus in Figure l the hook 86 ofthe traveling block is shown connected with the swivel and in use is a part of the means for raising and lowering the drill stem. l

What is claimed is:

A pumping combination for rotary drilling equipment, comprising a pump barrel, an upwardly opening standing valve in the lower end of said pump barrel, a weighting shoe attached over the lower end of said pump barrel and over the standing valve located therein, said weighting shoe having'a longitudinal passage opening directly to said standing valve anda lateraly branch passage or passages in communication with said first passage for taking off oil at a desired level or levels above the bottom of the hole in which the shoe is rested, a piston operating in the pump barrel and having an upwardly opening valve to pass the oil on the down stroke of the piston, a hollow piston rod connected to said piston operating out through the top of the pump barrel and having one element of a rotary tooljoint and a string of drill pipe having the companion element of a tool joint and thereby connected with said hollow piston rod. Y

In witness whereof, I have hereunto set m hand this 29th dayof July, 1925. y

i WALDO SHELDON. 

